Finding the Fourth Proportional to 31,018.42, 42,804.93 and 16,871.14

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.42 : 42,804.93 = 16,871.14 : x
2. Step 2: Convert to fraction form
   31,018.42/42,804.93 = 16,871.14/x
3. Step 3: Cross multiply
   31,018.42x = 42,804.93 × 16,871.14
4. Step 4: Simplify right side
   31,018.42x = 722,167,966.72
5. Step 5: Solve for x
   x = 722,167,966.72/31,018.42
6. Step 6: Final answer
   x = 23,281.91